What is the best way to collect information from multiple form (web) pages?

[WorldNews]

Hello all,

What is the best way to collect information from multiple form (web) pages?
To be more descriptive:
1- I need to collect information from page1.php
2- Process this on server side, based on info on this page, then collect info
either from pagex2.php or pagey2.php
3- And then depending on whether info on these pages was the right one
then add the data from page1.php with new data provided in pagex2.php
or pagey2.php and either insert the whole thing into MySQL or not.

SO basically what is the best/smartest way with PHP to collect data from
forms on multiple web pages and then at the very last web (PHP) page decide
to insert these into MySQL or do something else?

Best Regards.

[QMonkey]

I'd use sessions to store the input through till the end.

[Hammer65]

$_SESSION['form'][$step] = $_POST; 

The $step variable would be the step in the multipage form being submitted.